#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
#include<ctype.h>
int main()
{
    char ch = '0';
    while (scanf("%c", &ch) != EOF)
    {
        getchar();
        if (isalpha(ch))
            printf("%c is an alphabet.\n", ch);
        else
            printf("%c is not an alphabet.\n", ch);
    }

    return 0;
}